1 School of Medicine, Texas A&M University, Houston, Texas.
2 Bernice and Harvey Jones Eye Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
3 Cullen Eye Institute, Baylor College of Medicine, Houston, Texas.
4 University of Medicine and Health Sciences, New York, New York.
5 John A. Moran Eye Center, University of Utah, Salt Lake City, Utah; Clinica de Olhos De Francesco, Fortaleza, Brazil; Hospital de Olhos Leiria de Andrade, Fortaleza, Brazil.
6 John A. Moran Eye Center, University of Utah, Salt Lake City, Utah; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; Prism Eye Institute, Mississauga, Canada. Electronic address: ikeahmed@mac.com.